My daughter (now age 20), has been searching for years to find a book she loved to check out from her elementary school library in first grade +/-. She has re-searched the library many times, spoken to teachers, friends and has had no luck. I remember her bringing it home, so I know it isn’t a figment of her imagination.
What she remembers:
— Picture book of a horse in a forest of silver trees, limited (if any) text
— Illustrations in black ink/watercolor style
— Limited color palette, black, white, gold and maybe silver
— Possibly part of a series/pack of picture books
— Horse is main character on some kind of quest or adventure, with many crystals in the forest, possibly gold
— Special lake in the forest, perhaps also a cave
— Likely blue hard cover, she thinks larger than 8.5×11
— Likely an “older” book, I’m guessing from 1960s or even older